The use of relays in uplink MU Massive-MIMO system

Voicu, Carmen; Berceanu, Madalina-Georgiana; Halunga, Simona

doi:10.1117/12.2324866

Cited by 3 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The noise present on the channel is modeled as additive white Gaussian noise. The spread signal is sent through the two paths mentioned above to reach the base station [53,54], thus the signal received by relay from the source , , , 1,2,...,…”

Section: Relay Transmissionmentioning

confidence: 99%

See 1 more Smart Citation

Performance Comparison of Massive MIMO System with Orthogonal and Nonorthogonal Multiple Access for Uplink in 5G Systems

2020

Self Cite

View full text Add to dashboard Cite

In the attempt to respond to market demands, new techniques for wireless communication systems have been proposed to ensure, to all active users that are sharing the same network cell, an increased quality of service, regardless of any environmental factors, such as their position within the cell, time, space, climate, and noise. One example is the nonorthogonal multiple access (NOMA) technique, proposed within the 5G standard, known for supporting a massive connectivity and a more efficient use of radio resources. This paper presents two new sets of complex codes— multiple-user shared-access (MUSA) and extended MUSA (EMUSA), and an algorithm of allocation such that the intercorrelation should be as reduced as possible that can be used in MUSA for 5G NOMA-based technique scheme. Also, it analyzes the possibility of creating complex codes starting from PN (cPN), which is a novel idea proposed in this paper, whose results are promising with respect to the overall system performances. First, a description of the basic principles of MUSA are presented; next, the description of the proposed system will be provided, whose performance will be tested using Monte Carlo MATLAB simulations based on bit error rate (BER) versus signal-to-noise ratio (SNR). The system performances are evaluated in different scenarios and compared with classical code division multiple access (CDMA) having the following system parameters in sight: the number of antennas at the receiver side and the number of active users.

show abstract

Section: Relay Transmissionmentioning

confidence: 99%

“…Hs n , The spread signal is sent through the two paths mentioned above to reach the base station [53,54], thus the signal received by relay from the source…”

Section: Relay Transmissionmentioning

confidence: 99%

Performance Comparison of Massive MIMO System with Orthogonal and Nonorthogonal Multiple Access for Uplink in 5G Systems

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…As wireless systems are designed to operate at higher bandwidths and frequencies, it is becoming increasingly important to address the performances of devices at the network edge. A relay device can boost the signal strength and extend the coverage of the communication system by acting as an intermediary device [3][4][5]. This enhances the communication system's per-formance, especially in situations where the direct link between the source and destination nodes is unreliable or unavailable.…”

Section: Introductionmentioning

confidence: 99%

“…The performance of CR-NOMA systems [3][4][5][6][7][8][9][10][11][12] have been studied using correlation-based stochastic models (CBSM) channel models [14,15]. The CBSM model is used for theoretical study and is known to have lower accuracy when applied to real-world massive multiple-input multiple-output (MIMO) systems due to the presence of non-stationary phenomena and spherical effects [27].…”

Section: Introductionmentioning

confidence: 99%

“…This enhances the communication system's performance, especially in situations where the direct link between the source and destination nodes is unreliable or unavailable. This has been demonstrated in the research reported in [3–12]. Cooperative–relaynon‐orthogonal multiple access (CR‐NOMA), which combines network coding schemes with the NOMA concept, was introduced in [13] as a way to enhance the performance of users at the edge of a cell.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stochastic geometry modelling and analysis for cooperative NOMA with large transmit antennas for 5G applications and beyond

et al. 2023

View full text Add to dashboard Cite

Among the technologies that have made 5G wireless communication successful are non‐orthogonal multiple access (NOMA) and cooperative NOMA. The distinction is that cooperative NOMA adds coding schemes to improve performance. Nevertheless, research on cooperative NOMA has primarily used theoretical correlation‐based stochastic models (CBSM) instead of geometric‐based stochastic models (GBSM) that represent suitable channel conditions by including characteristics like path loss, delay profile, and angle of arrival in the model. This paper connects the low adoption of GBSM is due to computational challenges. Given this, it is essential to assess cooperative NOMA that employs GBSM with large antenna transmitters to meet future 5G expectations. The cooperative NOMA system's transmitter is modelled as a uniform rectangular array and a novel channel realisation is proposed for analysis. The location vector of the antenna using the physical dimension of the array is defined to reduce computational problems. Results shows that the average bit‐error performance of GBSM matches that of CBSM at the same antenna element separation, but the spatial correlation between antenna elements significantly impacts the outage probability and average achievable rates of GBSM performance. Enhanced GBSM performance by increasing antenna separation at the transmitter above one‐eighth wavelength.

show abstract

The performance of an uplink Massive MIMO OFDM-based multiuser system with LDPC coding when using relays

Berceanu

Voicu

Halunga

2019

2019 IEEE 25th International Symposium for Design and Technology in Electronic Packaging (SIITME)

View full text Add to dashboard Cite

The use of relays in uplink MU Massive-MIMO system

Cited by 3 publications

References 4 publications

Performance Comparison of Massive MIMO System with Orthogonal and Nonorthogonal Multiple Access for Uplink in 5G Systems

Performance Comparison of Massive MIMO System with Orthogonal and Nonorthogonal Multiple Access for Uplink in 5G Systems

Stochastic geometry modelling and analysis for cooperative NOMA with large transmit antennas for 5G applications and beyond

The performance of an uplink Massive MIMO OFDM-based multiuser system with LDPC coding when using relays

Contact Info

Product

Resources

About